feat: add proxy support for outputs/cloudwatch (#11399)

plugins/outputs/cloudwatch/README.md

@@ -59,6 +59,10 @@ The IAM user needs only the `cloudwatch:PutMetricData` permission.
   ##   ex: endpoint_url = "http://localhost:8000"
   # endpoint_url = ""
 
+  ## Set http_proxy
+  # use_system_proxy = false
+  # http_proxy_url = "http://localhost:8888"
+
   ## Namespace for the CloudWatch MetricDatums
   namespace = "InfluxData/Telegraf"
 

plugins/outputs/cloudwatch/cloudwatch.go

@@ -15,6 +15,9 @@ import (
 
 	"github.com/influxdata/telegraf"
 	internalaws "github.com/influxdata/telegraf/config/aws"
+
+	httpconfig "github.com/influxdata/telegraf/plugins/common/http"
+
 	"github.com/influxdata/telegraf/plugins/outputs"
 )
 
@@ -26,12 +29,10 @@ type CloudWatch struct {
 	Namespace             string `toml:"namespace"` // CloudWatch Metrics Namespace
 	HighResolutionMetrics bool   `toml:"high_resolution_metrics"`
 	svc                   *cloudwatch.Client
-
-	WriteStatistics bool `toml:"write_statistics"`
-
-	Log telegraf.Logger `toml:"-"`
-
+	WriteStatistics       bool            `toml:"write_statistics"`
+	Log                   telegraf.Logger `toml:"-"`
 	internalaws.CredentialConfig
+	httpconfig.HTTPClientConfig
 }
 
 type statisticType int
@@ -159,12 +160,24 @@ func (*CloudWatch) SampleConfig() string {
 }
 
 func (c *CloudWatch) Connect() error {
+
 	cfg, err := c.CredentialConfig.Credentials()
+
 	if err != nil {
 		return err
 	}
 
-	c.svc = cloudwatch.NewFromConfig(cfg)
+	ctx := context.Background()
+	client, err := c.HTTPClientConfig.CreateClient(ctx, c.Log)
+
+	if err != nil {
+		return err
+	}
+
+	c.svc = cloudwatch.NewFromConfig(cfg, func(options *cloudwatch.Options) {
+		options.HTTPClient = client
+	})
+
 	return nil
 }
 

plugins/outputs/cloudwatch/sample.conf

@@ -27,6 +27,10 @@
   ##   ex: endpoint_url = "http://localhost:8000"
   # endpoint_url = ""
 
+  ## Set http_proxy
+  # use_system_proxy = false
+  # http_proxy_url = "http://localhost:8888"
+
   ## Namespace for the CloudWatch MetricDatums
   namespace = "InfluxData/Telegraf"